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Related Concept Videos

The Cochlea01:13

The Cochlea

52.8K
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
52.8K
Hair Cells01:22

Hair Cells

46.9K
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
46.9K
Auditory Pathway01:15

Auditory Pathway

9.2K
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
9.2K
Anatomy of the Ear01:16

Anatomy of the Ear

14.2K
Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
14.2K
The Auditory Ossicles01:11

The Auditory Ossicles

4.0K
The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
4.0K

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Trans-impedance matrix heatmap patterns in cochlear implant patients with different cochlear pathologies: meningitis, otosclerosis, and temporal bone fractures.

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Evaluation of S-Value in relation to cochlear anatomy in pediatric cochlear implant users.

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The Soundtrack of Everyday Life: Real-world Music Listening Habits of Adult Cochlear Implant Users.

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The Impact of Robot-Assisted Electrode Insertion on Cochlear Implant Surgery Time: A Retrospective Study.

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Related Experiment Video

Updated: Apr 18, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research
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The Miniature Pig: A Large Animal Model for Cochlear Implant Research

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Cochlear Morphology and Its Influence on Electrode Array Proximity to Modiolus.

Moayyad Malas1,2, Mariam Aljehani1,2, Abdulrahman Alsanosi1,2

  • 1King Abdullah Ear Specialist Center (KAESC), King Saud University Medical City, King Saud University, Riyadh, Saudi Arabia.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|April 17, 2026
PubMed
Summary
This summary is machine-generated.

Cochlear implant electrode positioning is comparable in round and elliptical cochlear shapes, despite minor variations in distance to the modiolus. This suggests stable electrode placement across different cochlear anatomies.

Keywords:
Cochlear anatomyCochlear implantCochlear parametersHearing loss

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Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion
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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Biomedical Engineering

Background:

  • Cochlear implant (CI) surgeries are increasing, necessitating patient-centered improvements.
  • Cochlear basal turn shape (elliptical vs. round) is a new classification, but its impact on electrode position is unknown.

Purpose of the Study:

  • To evaluate the effect of different cochlear shapes on electrode-to-modiolus distance (EMD) in CI patients.

Main Methods:

  • Retrospective analysis of 41 patients with normal cochleae undergoing CI.
  • Postoperative imaging used to assess cochlear morphology and electrode positioning.
  • Basal turn width-to-height ratio (B/A) quantified cochlear shape; EMD was measured.

Main Results:

  • Mean EMD decreased from basal (3.3 mm) to apical (1.9 mm) electrodes.
  • Round cochleae (B/A >0.75) showed comparable basal EMD to elliptical shapes (3.3 vs. 3.5 mm).
  • Significant difference in basal electrode impedance observed between round and elliptical cochleae at 12 months.

Conclusions:

  • No statistically significant association found between cochlear anatomy and EMD.
  • Lateral wall electrodes show stable positioning across elliptical and round basal turn shapes.
  • Exploratory findings warrant larger prospective studies on cochlear morphology and electrode design.